The melting curve of aluminium was measured [1]}, [2]}
up to 80 GPa using diamond anvil cells (DAC) and even higher at
125 GPa by means of shock experiments [3]}. In Fig. REF ,
the results obtained from the HDNN are compared to
these experimental data [1]}, [2]}, [3]},
the ab initio based equation of states (EOS) [7]}
as well as the AIMD two-phase approach [8]} for which
the GGA for the XC functional and 512 atoms were used. At ambient
pressure, the HDNN potential yields a value of \(T_M=970\)  K which
overestimates the experimental one of 933 K by 5%. This is also
the case for for the AIMD [8]} to a lesser extent
recalling that the GGA was used and overestimates the atomic volume
[10]}, [8]}. With increasing pressure, the melting
curve from the HDNN potential slightly underestimates the experiments
as well as the EOS. By using two different sizes and shapes,
negligible influence on the determination of the melting curve was
found, confirming earlier results on pure Zr [12]}.
Noticeably, the reliability of the present potential on the melting
line up 200 GPa is then assessed, even if high pressure thermodynamic
states included in the training set are really scarce.
<FIGURE>